docs: def get_similar(self, limit=None):
          """
          Returns similar tracks for this track on the network,
          based on listening data.
          """
  
          params = self._get_params()
          if limit:
              params["limit"] = limit
  
          doc = self._request(self.ws_prefix + ".getSimilar", True, params)
  
          seq = []
          for node in doc.getElementsByTagName(self.ws_prefix):
              title = _extract(node, "name")
              artist = _extract(node, "name", 1)
              match = _number(_extract(node, "match"))
  
              seq.append(SimilarItem(Track(artist, title, self.network), match))
  
          return seq